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AssigneeThe Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom
InventorsGraeme P. Nicholson, Mark J. Kan, Gareth Williams, Michael G. Drew, Paul D. Beer
Estimating the term…
1 Disclosed are “acid-amide” calixarenes of formula (I) wherein: L is [—CH2—] or [—O—CH2—O—] and may be the same or different between each aryl group; R5 is H, halogen, or C1-C10 aliphatic hydrocarbyl group, C6-C20 aryl group, C6-C20 hydrocarbyaryl group, any of which may optionally be substituted by one or more halo or oxo groups or interrupted by one or more oxo groups, and R5 may be the same or different on each aryl group: R1 comprises an optionally protected carboxy group: two groups out of R2, R3, and R4 are H; the one group out of R2, R3, and R4 not being H comprises an amide group. The amide group may be linked to a second calixarene to form a dimer. Also disclosed are methods of use of such calixarenes for the purposes of metal sequestration, especially of lanthanides and actinides. Also disclosed are calixarene dimer derivatives of the calixarenes of the invention. Also disclosed are processes for preparing the calixarenes and dimers.
Calixarenes of the formula (I)
Calixarenes as claimed in any one of the preceding claims wherein the amide group R2, R3, or R4 of formula (I) is of the general formula (D):
A calixarene of the formula (II) as described herein.
Calixarenes of the general formulae (I) or (II) wherein some or all of phenyl groups of the calixarene ring are further peripherally substituted.
A method of sequestering metals comprising contacting the metals with a calixarene as claimed in any one of the preceding claims.
Calixarenes of a formula (I)
A calixarene of formula (II)
Calixarenes of a formula (IV)
Dependencies are inferred from the claim text.